'''程序功能：判断3个数值中最大值'''x_str = input("请输入X: ")while True:    if not x_str.isdecimal():        x_str = input("检测到您输入非数字,请重新输入数字X: ")    else:        breaky_str = input("请输入Y: ")while True:    if not y_str.isdecimal():        y_str = input("检测到您输入非数字,请重新输入数字Y: ")    else:        breakz_str = input("请输入Z: ")while True:    if not z_str.isdecimal():        z_str = input("检测到您输入非数字,请重新输入数字Z: ")    else:        breakx = int(x_str)y = int(y_str)z = int(z_str)if x >= y:    temp = x    if temp >= z:        print("X,Y,Z中最大数为X = " + str(temp))    else:        print("X,Y,Z中最大数为Z = " + str(z))else:    temp = y    if temp >= z:        print("X,Y,Z中最大数为Y = " + str(temp))    else:        print("X,Y,Z中最大数为Z = " + str(z))